气候变化领域集成服务门户(CCPortal): Inundation mapping based on reach-scale effective geometry

CCPortal

DOI	10.5194/hess-22-5967-2018
	Inundation mapping based on reach-scale effective geometry
	Rebolho C.; Andréassian V.; Le Moine N.
发表日期	2018
ISSN	1027-5606
起始页码	5967
结束页码	5985
卷号	22 期号:11
英文摘要	The production of spatially accurate representations of potential inundation is often limited by the lack of available data as well as model complexity. We present in this paper a new approach for rapid inundation mapping, MHYST, which is well adapted for data-scarce areas; it combines hydraulic geometry concepts for channels and DEM data for floodplains. Its originality lies in the fact that it does not work at the cross section scale but computes effective geometrical properties to describe the reach scale. Combining reach-scale geometrical properties with 1-D steady-state flow equations, MHYST computes a topographically coherent relation between the height above nearest drainage and streamflow. This relation can then be used on a past or future event to produce inundation maps. The MHYST approach is tested here on an extreme flood event that occurred in France in May-June 2016. The results indicate that it has a tendency to slightly underestimate inundation extents, although efficiency criteria values are clearly encouraging. The spatial distribution of model performance is discussed and it shows that the model can perform very well on most reaches, but has difficulties modelling the more complex, urbanised reaches. MHYST should not be seen as a rival to detailed inundation studies, but as a first approximation able to rapidly provide inundation maps in data-scarce areas. © Author(s) 2018.
语种	英语
scopus关键词	Equations of state; Geometry; Mapping; Efficiency criteria; Extreme flood events; Geometrical property; Hydraulic geometry; Inundation mappings; Model complexity; Model performance; Steady-state flows; Floods; accuracy assessment; computer simulation; cross section; digital elevation model; drainage; floodplain; geometry; mapping; performance assessment; spatial distribution; steady-state equilibrium; streamflow; France
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159848
作者单位	Rebolho, C., Irstea, UR HYCAR, 1 Rue Pierre-Gilles de Gennes, Antony, 92160, France; Andréassian, V., Irstea, UR HYCAR, 1 Rue Pierre-Gilles de Gennes, Antony, 92160, France; Le Moine, N., Sorbonne Universités, UPMC Univ Paris 06, CNRS, EPHE, UMR 7619 Metis, 4 Place Jussieu, Paris, 75005, France
推荐引用方式 GB/T 7714	Rebolho C.,Andréassian V.,Le Moine N.. Inundation mapping based on reach-scale effective geometry[J],2018,22(11).
APA	Rebolho C.,Andréassian V.,&Le Moine N..(2018).Inundation mapping based on reach-scale effective geometry.Hydrology and Earth System Sciences,22(11).
MLA	Rebolho C.,et al."Inundation mapping based on reach-scale effective geometry".Hydrology and Earth System Sciences 22.11(2018).